Scraper-bowl construction



Dec. 16, 1930.. J. ADAMS SCRAPER BOWL CONSTRUCTION Filed Nov.

INVENTOR .Qbm

ATTORNEY w in the bowl in its 2 is a side elevation of the bowl in t1 Patented Dec. 16,1930

UNITED STATES, PATENT OFFICE- WILLIAM J. DAMS, OF SAN'IA CRUZ, CALIII'OBNIA, ASSIGROB BALL WAGON GRADE] COIPAHY, OF STOCKTON, CALIFORNIA, A. CORPORATION sewnsown cousraucnoir Application fled Iovember 6, 1888. No. 817,628.

"This invention relates to scraper bowls and especially to one of that character having a dischar e gate at its rear end and which is dumped y raising up the front end of the 5 bowl. The structure of the present inven- ,tion also particularly represents improve-" ments over the type of bowl and discharge ate shown'in the patent to C. E. and S. H. all, No. 1,593,007, dated July 20th, 1926. In the previous type of bowl the gate was so mounted that when open there was a tendency for the dirt, es ciallif wet or of a heavy nature, to catch t ereon and to wedge in the bowl, so that it would fail to be proper- .15 ly discharged. Also the gate when opened becamelowered to a considerable distance below the bottom of the bowl which interfered with the leaving of the dirt in acompact heap as the scraper moved forward. A major ab 20 ject' of the present invention therefore is to so shape and mount the discharge gate as to avoid these objectionable features.

Other features of improvement of the present bow'l construction consist in providing a 25 removable cutting blade for the bowl so that said blade may be easily changed or resharpshed, and to apply the raising members to the bowl so that a stronger connection is made and the is accomplished with a lesser 80 expenditureo wer.

A further ob ect of the invention is to (Froyet duce asimple and inexpensive device an a one which will be exceedingly efiective for the purpose for which it is des1 ed.

35 These objects I accomplislr y means of such structure and relative arrangement ofarts as will full appear by a perusal of the ollowing spec cation an claim.-

In the drawings similar characters of reference indicate corresponding parts in the 5 several views:

' Fig. 1 is a sectional elevation'of my improved bowl as mounted in connection with its supporting and taperating structure show gging position.

rai or discharging position and with the gate open, also'shown associated with its sup;

particularly to the,

porting structure.

' ferrmg now more curvature (relative to the front edge) hinge means fort characters of reference on the drawings, the

bowl com rises a substantiall' flat bottom then slope upwardly and rearwardly for a greater distance as at B. The rear edges of a the side plates have'a continuous concave as shown at G, and extend from the top of said front edge'to the rear edge of the bottom plate.

The rear end of the bowl is normally enclosed by a gate 3 which extends from top to bottom of the curved back edge of the side plates and has the same curvature. Said gate also alines with saidcurved edge when closed; Large side. ears or plates 4 secured to the end gate'extend from the to to bottom thereof and have a running fit tween the side plates of the bowl. Bolts 5 connect the ears and the side plates and form the pivot or sitio'ned in a longitudinal planev some 'stance rearwardlyof thejunction of the rear and frontedges of-lthe sides, and in a horizontal lane some distance below saidjunction.

e front end of the bowl is reinforced by a relatively heavy-and wide stra 6 which is riveted-to and extends across the ttomplate and up the vertical portions A of the side lates, said strap'being. on the outside oi the bowl and projecting ahead of said bottom and side atesxsomewhah- -Tothe bottom portion o the strap a cutting blade 7 is re- .movablysecured, said blade extending, from and lying flush with the forward edge. of the bottom of the bowl .to -.a point somedistance ahead of the strap, as showninFlg'. 1. The front edge of the. strap. is alsopreferably eveled ofi at 8 to form .an'auxiliary cut v V iuth pmv ousb bo hth b w has three connections the a frame atrucs we; .whi h'ifis'munsa. These c necegate, these bolts being 0- l intermediate the top and bottom thereof, and points adjacent the pivots, and a slight reto the frameahead; and control cables 12 or verse inclination from those points rearwardthe like connected to the straps 6 adjacent the ly to the lower rear corners of the side plates.

top thereof and extending thence vertically to and over sheaves 13 mounted on the frame. The cables therefore are connected to the bowl at such points relative to the links 10 as to obtain a Very advantageous leverage when lifting the bowl; and such connections being made directly with the heavy straps 6 are very substantial without any undue strain being placed on the relatively thin side frames of the bowl.

Pulling up on these cables as before raises the front end of the bowl and the rear end also, but a lesser distance, the end-gate being then forced open by the pressure of the load in the bowl as soon as the holding latch means 14 is released. Owing to the positioning of the pivot or hinge connections of the gate with the side plates, 2. wide opening is provided between the bottom of the gate and the rear end of the bbwl without an excessive opening movement of the gate being necessary, so that the dirt in the bowl will not be choked or restricted in any way in its discharge. Also on account of such positioning of the pivots the bottom of the gate when opened is not positioned as low as the rear end of the bowl so that it will not engage and drag against the dirt after the latter is discharged and the scraper is moved forward.

The end-gate having a continuous and smooth curvature, not only gives the bowl a large holding capacity but allows the dirt to slide freely from said gate, without any tendency for some of the dirt to be restrained and pocketed. The side plates or ears on the gate apart from reinforcing the same tend to scrape the sides of the bowl clean as the gate closes, thereby dislodging any dirt which mi ht tend to cling thereto.

rom the foregoing description it will be readily seen that I have produced such a device as substantially fulfills the objects of the invention as set forth herein.

While this specification sets forth in detail the present and prefered construction of the device, still in practice such deviations from such detail may be resorted to as do not formadeparture from the spirit of the invention, as defined by the appended claim.

u Having thus described my invention what I claim as new and useful and desire to secure by Letters Patent is:

' A scraper bowl having bottom and side plates, an end-gate extending between the side plates and alining with the rear edges thereof when the gate is closed, ears on the edges of the gate having a running fit between the side plates of the bowl, pivots between the ears and bowl nearer the top than the bottom thereof, the forward edges of the ears having a slight inclination forwardly from the upper rear corners of ,the side plates to In testimony whereof I aflix my signature.

WILLIAM J. ADAMS. 

